Design of a Heat Pump Assisted Solar Thermal System

This paper outlines the design of an active solar thermal loop system that will be integrated with an air source heat pump hot water heater to provide highly efficient heating of a water/propylene glycol mixture. This system design uses solar energy when available, but reverts to the heat pump at night or during cloudy weather. This new design will be used for hydronic heating in the Applied Energy Laboratory, a teaching laboratory at Purdue University, but it is more generally applicable for a residential scale system that could be used for both hydronic heating and hot water production. This combined system should provide efficient heating at a fraction of the operating costs of competing electric, gas, or even heat pump water heaters. The initial cost of installing a similar system is currently relatively high, but it should be noted that the design is still in the prototype stage. The price should reduce dramatically when the system is commercialized. There are multiple applications where the production of heated fluid by a combined solar/heat pump hydronic system can be much more attractive than conventional heating methods. Construction and implementation of this proposed design will take place summer of 2014 and data collection will be pursued afterwards

State Mandates, Housing Elements, and Low-income Housing Production

In order to create low-income housing opportunities and mitigate exclusionary zoning, in 1968 Congress mandated that municipalities receiving comprehensive planning funds must create a housing element. In tandem, many states mandated that municipal housing elements must accommodate low-income housing needs. After examining empirical research for California, Florida, Illinois, and Minnesota, this review found aspirational success because those states rewarded the municipal planning process. In order to increase low-income housing, this review argues for state housing policy reform. Under US Department of Housing and Urban Development’s revised fair housing rule, which requires an assessment of local data, states can no longer ignore the exclusionary behavior of municipalities

Studying the Effects of the Intensity of US State Growth Management Approaches on Land Development Outcomes

Summary. Driven by negative externalities from suburban sprawl, many states in the US have adopted comprehensive growth management legislation in an effort to regulate land development more directly. Most extant scholarship evaluating the effects of growth management programmes employs a design that averages growth management’s effect across all of the growth management states. Yet, this approach largely ignores descriptive analyses of individual state growth management approaches which show large variation in both the methods and intensity of means by which states manage growth. This paper seeks to ascertain if differences in growth management intensity yield different evaluative outcomes. Analysis of panel data for nine growth management states using fixed effects regressions, across eight different model specifications, shows that only states with the strongest growth management intensity experience consistent success at reducing the expansion of urban land and increasing population densities. Beginning with the enactment of Hawaii’s Land Use Law in 1961, a number of US states have adopted comprehensive growth management legislation in an effort to pre

Like mixing oil and water?: the take up of sustainability in hard-to-reach places - an East Texas case study

Following studies about the adoption of sustainability initiatives in both innovative and ordinary US cities, this article offers a unique view of sustainability in hard-to-reach places where regulation and planning are viewed with suspicion. Taking an interpretive approach to policy analysis, the paper asks if hard-to-reach places are destined to remain untouched by what many argue is a central tenet of modern planning. In so doing, it offers a key point of contrast to studies on cities at the vanguard of change, reminding us how critical it is to recognise all types of communities in our research and practice